carter



(No Model.)l

T. WALKER 82; J. P. CARTER.

ORE ROASTING FURNAGE.

Patented Mar." 20, 1894;

WE mmomu. Ln'noanunma coMPANv.

AUNTTED STATES PATENT Ormea.

THOMAS VALKER AND JOHN F. CARTER, OF PHILADELPHIA, PENNSYLVA- NIA, ASSIGNORS TO J OI-IN A. BARHAM AND JOSEPH A. VINCENT, OF SAME PLACE.

ORE-ROASTl NG FU RNACE.

SPECIFICATION forming part of Letters Patent No. 516,783, dated March 20, 1894.

Application filed May 23, 1893. Serial No. 475,281. (No model.)

.To afZZ whom it may concern:

Be itknown that we, THOMAS WALKER andr JOHN F. CARTER, both citizens of the United States, and residents of Philadelphia, Pennsylvania,haveinventedcertainImprovements in Ore-Roasting Furnaces, 'of which the following is a specification.

The objechof our invention is to construct a furnace for roasting ores; our invention bero ing a modification of the arrangement described and claimed in lthe application for patent filed by us on December 14, 1892, Serial No. 455,165; the main feature of the invention being the arrangement of the retorts so that the material can be fed through the retorts and from one retort to the other without dusting. This object we attain in the following manner, reference being had to the accompanying drawings, in which- 2O furnace, showing two retorts. Fig. ,2, is a sectional view on the line 1--2, Fig. l, with the furnace body omitted, in order to more readily illustrate the retorts.

A is the body of the furnace.

a is the fire box, and a' the combustion chamber in which are arranged the retorts B, B', the products of combustion passing out through the stack a2. The retorts, as will be seen in the drawings, are inclined and the material is fed vup each inclined retort by the vibrating blades C mounted on a shaft E. In the present instance we arrange two sets of blades as shown in Fig. 2, so as to spread the ore under treatment in a thin layer.' On the end of the shaft E is an arm F.' connected by a rod E2 to power vibrating mechanism so that the shaft and blades will be vibrated, thus spreading the ore laterally over the surface of the retort, as well as feeding the ore forward through the retort. The shafts E are tubular and are connected at one end to a water supply pipe c, and at the opposite end to an outlet pipe e'. Suitable valves may be arranged in these pipes for controlling the supply of water, and to prevent back pressure. The shafts E are supported in suitable bearings F mounted preferably outside the furnace.

Figure 1, is a sectional view through the and rear walls of the furnacevare castings G,

G', which form continuations of the retorts, and in which are the inclined passages g for the ore under treatment. While these structures are made of cast metal, they may be made of wrought metal, fire clay, or other suitable material. The ore as it is fed up the inclined plane of one retort, reaches the mouth g', ofthe inclined passage g, and slides down this inclined passage to the retort B', where it is conveyed up either to the point of discharge when two retorts are used, orto another inclined passage to iow into a third retort, and so on, depending upon the number of retorts in the furnace.

We have shown by dotted lines in Fig. 2, a

in this instance at one side of the furnace,

and the outlet at the opposite side.

The inlet as shown in Fig. 1, is through a hopper b and passage b', and the flow of material into the furnace may be controlled by any suitable feeding mechanism.

The fume exits d are preferably formed in the walls of the furnace, and, as shown, in the present instance communicate with the highest point of each retort. Thus it will be seen that we are enabled to feed the material slowly through the retorts, and carry the material from one retort to the other without dusting, and without passing through the fumes.

We claim as our invention 1. The combination in a furnace, of the casing or body, retorts arranged side by side at an incline therein, the alternate retorts being inclined in opposite directions, and an inclined passage forming communication between successive retorts so as to allow the material to flow from one retort to the other, without dusting, substantially as described.

' 2. The combination in an ore roasting furnace, of retorts, arranged side by side and inclined alternately in opposite directions, retort heads one of which has an inclined passage forming a communication between the In testimony1 whereof we have signed our retorts for the passage of ore, and feeding names to this specification in the presence of mechanism arranged in said retorts, substantwo subscribing witnesses.

tially as described. THOMAS WALKER.

5 3. The combination in an ore roasting fur- JOHN F. CARTER.

nace, of retorts inclined alternately in oppo- Witnesses tothe signature of Thos. Walker: site directions, a passage connecting the up- HENRY JUNKlN, per end of one retort with the lower end of R. CAMPION. the next retort, and mechanism for feeding Witnesses to the signature of J. F. Carter:

lo the ore from the lower to the upper end of HENRY HOWSON,

each retort, substantially as specified. WILLIAM D. CONNER. 

